#1309567: fix linecache behavior of stripping subdirectories from paths when looking for relative filename matches. Also add a linecache test suite.

Update bdist_msi so that the generated MSIs for pure Python modules can install to any version of Python, like the generated EXEs from bdist_wininst. (Previously, you had to create a new MSI for each version of Python.)

the __doc__ into the subclass instance __dict__.  The fix refactors
property_copy to call property_init in such a way that the __doc__
logic is re-executed correctly when getter_doc is 1, thus simplifying
property_copy.

Issue #5692: In :class:`zipfile.Zipfile`, fix wrong path calculation when extracting a file to the root directory.

Patch by Nick Barnes and Victor Stinner.

GIL is now released during computation on data lengths >= 2048 bytes.

PyUnicode_DecodeUTF8() once, remember the result and output it in a second
step. This avoids problems with counting UTF-8 bytes that ignores the effect
of using the replace error handler in PyUnicode_DecodeUTF8().

the is_*() methods and into module private instances.

many problems with the ancient mcast.py demo code.

which not only have embedded spaces, but leading spaces.

developing experimental versions of IDLE which are
not installed in the standard location.

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saving memory and avoiding growth in size of subsequent pickles. Proposal
and original patch by Jake McGuire.

Closes issue 5679.

Michael Foord

This is done by recording the current time -1sec, and not re-reading unless
the directory mod. times are >= the recorded time.

(Related to issue #5880).